package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    @PostMapping("/login")
    public R<Employee> login(HttpSession session, @RequestBody Employee employee) {
        //1. 将页面提交的密码password进行MD5加密处理;
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2. 根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3. 没有查询到就返回登录失败结果
        if (emp == null) {
            return R.error("登陆失败");
        }

        //4.  进行密码比对,如果不一致返回登陆失败
        if (!emp.getPassword().equals(password)) {
            return R.error("登陆失败");
        }

        //5. 查看员工状态,如果不一致返回登陆失败
        if (emp.getStatus() == 0) {
            return R.error("登陆失败");
        }

        //6. 登录成功,将员工id存入Session并返回登陆成功结果
        session.setAttribute("employee", emp.getId());
        return R.success(emp);

    }

    @PostMapping("/logout")
    public R<String> logout(HttpSession session) {
        session.removeAttribute("employee");
        return R.success("退出成功");
    }

    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工,员工信息:{}", employee.toString());
        //设置初始密码123456 进行MD5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //获得当前登录用户的id
        Long empId = (Long) request.getSession().getAttribute("employee");

        log.info(empId.toString());
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);

        employeeService.save(employee);

        return R.success("新增员工成功");
    }

    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page= {},pageSize= {},name= {}", page, pageSize, name);
        //构建分页查询器
        Page pageInfo = new Page(page, pageSize);

        //条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        //添加查询条件
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        employeeService.page(pageInfo, queryWrapper);

        return R.success(pageInfo);

    }

    /**
     * 根据id修改员工信息
     *
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request, @RequestBody Employee employee) {
        log.info(employee.toString());

        //获取登录用户的id
        Long employeeId = (Long) request.getSession().getAttribute("employee");

        //更新修改人
        employee.setUpdateUser(employeeId);
        employee.setUpdateTime(LocalDateTime.now());

        employeeService.updateById(employee);
        return R.success("修改员工信息成功");
    }

    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息");
        Employee emp = employeeService.getById(id);
        if(emp != null){
           return R.success(emp);
        }
        return R.error("没有查询到员工信息");
    }
}
